Why it is not possible to override mutable variable in scala?

Question

Why it is not possible to override mutable variable in scala ?

class Abs(var name: String){
}

class AbsImpl(override var name: String) extends Abs(name){
}
         


        

Answer 1

This happens when the var you are trying to override already has an assignment. I am not sure why this is forbidden, but also it makes little sense.

See also this question.

Define name as abstract instead

trait Abs {
  var name: String
}

class AbsImpl(name0: String) extends Abs {
  var name = name0
}

or

trait Abs {
  var name: String
}

class AbsImpl(private var name0: String) extends Abs {
  def name = {
    println("getter")
    name0
  }

  def name_=(value: String) = {
    println("setter")
    name0 = value
  }
}